Radiative transfer in black hole systems
Kinwah Wu (1), Warrick Ball (2), Steven V. Fuerst (3) ((1) Mullard, Space Science Laboratory, University College London, UK, (2) Department of, Physics, Astronomy, University College London, UK, (3) KIPAC, Stanford, University, USA)
TL;DR
This paper develops a covariant radiative transfer framework for curved spacetime and applies it to black hole systems, analyzing emissions, shadows, and effects of different opacities in accretion flows.
Contribution
It introduces a covariant formulation for radiative transfer in curved spacetime and demonstrates its application to various black hole accretion scenarios.
Findings
Calculated emissions from semi-transparent accretion tori with Fe K line opacity
Analyzed emissions from radiative inefficient accretion flows with electron-positron annihilation opacity
Showed black hole shadows with different spins and surrounding material distributions
Abstract
We present a convariant formulation for radiative transfer in curved space time and demonstrate some applications in the black-hole systems. We calculate the emission from semi-transparent accretion tori around black holes, for opacity provided by the Fe K lines and for opacity dominated by electron scattering. We also calculate the emission from radiative inefficient accretion flow in black holes with opacity provided by electron-positron annihilation lines. Finally we show shadows cast by accreting black holes with different spins and with different distribution of warm material around them.
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Taxonomy
TopicsAstrophysical Phenomena and Observations · Relativity and Gravitational Theory · Black Holes and Theoretical Physics